From a1947cfabb56873d99199658daf9a62ebfea3c86 Mon Sep 17 00:00:00 2001
From: Abhishek <akvikramaditya007cppcoder@gmail.com>
Date: Thu, 12 Nov 2026 20:45:37 +0530
Subject: [PATCH] =?UTF-8?q?=F0=9F=90=9B=20FIX:=20Keep=20a=20literal=20back?=
 =?UTF-8?q?slash=20before=20a=20space=20in=20link=20destinations?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 markdown_it/helpers/parse_link_destination.py |  5 ++++-
 tests/test_port/fixtures/commonmark_extras.md | 15 +++++++++++++++
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/markdown_it/helpers/parse_link_destination.py b/markdown_it/helpers/parse_link_destination.py
index c98323c0..e4859fbb 100644
--- a/markdown_it/helpers/parse_link_destination.py
+++ b/markdown_it/helpers/parse_link_destination.py
@@ -56,7 +56,10 @@ def parseLinkDestination(string: str, pos: int, maximum: int) -> _Result:
 
         if code == 0x5C and pos + 1 < maximum:
             if charCodeAt(string, pos + 1) == 0x20:
-                break
+                # a backslash before a space is a literal backslash,
+                # and the space then ends the destination
+                pos += 1
+                continue
             pos += 2
             continue
 
diff --git a/tests/test_port/fixtures/commonmark_extras.md b/tests/test_port/fixtures/commonmark_extras.md
index 98ce1ad5..88b22588 100644
--- a/tests/test_port/fixtures/commonmark_extras.md
+++ b/tests/test_port/fixtures/commonmark_extras.md
@@ -324,6 +324,21 @@ Escaped space is not allowed in link destination, commonmark/CommonMark#493.
 <p>[link](a\ b)</p>
 .
 
+Backslash before a space in a link destination is a literal backslash, and the space ends the destination (CommonMark 0.31.2 6.3)
+.
+[a](/url\ )
+
+[b](/url\ "title")
+
+[c]
+
+[c]: /url\ "title"
+.
+<p><a href="/url%5C">a</a></p>
+<p><a href="/url%5C" title="title">b</a></p>
+<p><a href="/url%5C" title="title">c</a></p>
+.
+
 Link destination cannot contain '<'
 .
 [](<foo<bar>)